Original Dutch article cited in the English article above, translated with deepl:

The victim is 33-year-old Islam al-Ashqar. She was killed yesterday in an explosion in the Nusairat refugee camp in central Gaza. ... AP news agency reports, based on Palestinian witnesses and authorities, that it was an Israeli bombing. The Israeli military has not yet responded to NOS questions about it. ... Whether this was also the explosion that killed Ashqar has not yet been confirmed. NOS is trying to verify that.)

So let's go over your comments here:

Dutch media sources seem to really be burying the lede on the fact that she was killed by an Israeli bombing run. ... that fact at the end

Not a verified fact.

and equivocating it with "According to the Associated Press". ... Most of the headlines just say she died "in an explosion", giving the implication Hamas was responsible.

Not equivocating or implying anything. Engaging in good journalism. They weren't there. They didn't see it with their own eyes. They're simply reporting on what they've been told. IDF says this. Hamas says that. Nothing more. That's just your bias speaking.

If the IDF makes a claim, reporters shouldn't report it as a fact. If Hamas makes a claim, they shouldn't report it as a fact.

the IDF acknowledges that they bombed the refugee camp market on Saturday

Article says the IDF has not yet responded to inquiries. It is as yet unclear in which explosion the victim died.

I can't remember the exact timeline of events, but early on it was reported and assumed to be IDF, while others claimed it wasn't. Reports got walked back until there were more details, and now it's generally agreed that it was probably a Hamas rocket that exploded or something.

So I think the press may just be a little more careful with how they portray things when there is only one source or they are reporting on what other news organizations are saying. You know - like they should be doing anyway.